<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
    <meta charset="UTF-8">
    <title>Login</title>
</head>
<body>
    <div th:if="${param.error}">
        Invalid username and password
    </div>
    <div th:if="${param.logout}">
        You have been logged out
    </div>
    <form th:action="@{/login}" method="post">
        <div><label>用户名:</label><input type="text" name="username"/></div>
        <div><label>密码:</label><input type="password" name="password"/></div>
        <div><input type="submit" value="Sign In"/></div>
    </form>
</body>
</html>